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Sampling the sound field in auditoria using large natural-scale array measurements.

Ingo B Witew1, Michael Vorländer1, Ning Xiang2

  • 1Institute of Technical Acoustics, RWTH Aachen University, Templergraben 55, 52056 Aachen, Germany.

The Journal of the Acoustical Society of America
|April 5, 2017
PubMed
Summary

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A new automated measurement system precisely maps concert hall acoustics, capturing sound wave propagation and scattering effects. This technology enables detailed analysis of sound fields for improved architectural acoustics and concert hall design.

Area of Science:

  • Acoustics
  • Architectural Acoustics
  • Wave Propagation

Background:

  • Spatial wave field analysis requires high-resolution data satisfying the sampling theorem.
  • Previous measurement methods may lack the density or automation for comprehensive spatial acoustic analysis.

Purpose of the Study:

  • To present a novel measurement apparatus for automated spatial sound field sampling in auditoria.
  • To demonstrate the apparatus's capability in capturing detailed acoustic data for wave field analysis.

Main Methods:

  • Development of an automated measurement apparatus for sampling sound fields over a 5.30m x 8.00m surface.
  • Utilizing measured impulse responses for spatial wave field analysis.
  • Generating wave field animations to visualize sound propagation and scattering phenomena.

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Main Results:

  • The apparatus successfully sampled sound fields at appointed resolutions.
  • Wave field animations revealed sound scattering from theater seating (seat-dip effect) at grazing incidence.
  • Visualized data provided insights into reflections and scattering from auditorium boundaries.

Conclusions:

  • The developed measurement system is effective for detailed spatial wave field analysis in concert halls.
  • The captured data and visualizations offer new opportunities for understanding and optimizing architectural acoustics.
  • The study highlights the importance of high-resolution spatial data for analyzing complex acoustic phenomena.